On certain systems, there are tools that make them feel more native. Eg. on Dolphin Smalltalk which ran on Microsoft Windows, you can run a utility to stripped off the unnecessary parts (eg. the browser/editors and unused classes) of the image and it gets bundled into an .exe which includes a VM. A user wouldn't know it's running Smalltalk.

It turned out to be an excellent tool to write Windows app during its time. The live environment worked extremely well in working with and figuring out ActiveX and COM objects.. Even better than VS Studio at that time.